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6/3/2017

Optimisation methods

Gradient descent

Only accepts parameter changes which reduce cost function

Simulated annealing

Will allow increases in cost function with reducing probability

33

ESTRO physics course 2017

The inverse problem

Gradient descent can end in a local minima,

whereas simulated annealing will allow, some

“uphill” – like running down a ski slope.

C. Ma et al.

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ESTRO physics course 2017